Extension Study of the Safety and Efficacy of Multi-dose Intravenous ARC-520 in Patients With Chronic Hepatitis B (HBV) Infection

NCT ID: NCT02738008

Last Updated: 2026-01-13

Basic Information

• Recruitment Status: TERMINATED
• Clinical Phase: PHASE2
• Total Enrollment: 12 participants
• Study Classification: INTERVENTIONAL
• Study Start Date: 2016-03-31
• Study Completion Date: 2016-12-31

Brief Summary

Chronic HBV patients will receive 9 doses of open-label ARC-520 once every 4 weeks and be evaluated for safety and efficacy.

Detailed Description

Open-label, multi-center extension study of intravenous ARC-520 in combination with entecavir or tenofovir in patients with chronic HBV infection. Patients who successfully completed the Heparc-2002 (NCT02604199) and Heparc-2003 (NCT02604212) studies and responded to therapy are eligible to participate. Responders are defined as patients who showed a ½ log or greater reduction in their serum Hepatitis B Surface Antigen (HBsAg) levels from baseline to day 71 ± 3 days of the primary Heparc-2002 and Heparc-2003 studies. Patients who have signed a Human Research Ethics Committee approved informed consent and have met all of the protocol eligibility criteria will continue receiving daily oral entecavir or tenofovir and intravenous (IV) injections of ARC-520. Study visits will occur once every 4 weeks for a total of 9 visits for monitoring and ARC-520 administration.

Patients will undergo the following evaluations at regular intervals during the study: medical history, physical examinations, vital sign measurements (blood pressure, heart rate, respiratory rate and temperature), weight, adverse events (AEs), 12-lead electrocardiograms (ECGs), concomitant medications, blood sample collection for hematology, coagulation, chemistry, creatine kinase, troponin, hemoglobin A1c, exploratory pharmacodynamic (PD) measures, urinalysis, HBV serology, immunogenicity, and pregnancy testing for females of childbearing potential. Patients will be monitored for HBV virology, AEs, and exploratory PD measures for a total of 24 weeks after the last dose of ARC-520.

Conditions

Hepatitis B

Study Design

• Allocation Method: NA
• Intervention Model: SINGLE_GROUP
• Primary Study Purpose: TREATMENT
• Blinding Strategy: NONE

Study Groups

ARC-520 Injection

Multiple administrations of ARC-520 starting at a dose level of 2 mg/kg, plus entecavir (0.5 or 1.0 mg/day) or tenofovir (300 mg/day)

Group Type: EXPERIMENTAL

ARC-520 Injection

Intervention Type: DRUG

IV injection

entecavir

Intervention Type: DRUG

All participants will take entecavir or tenofovir throughout the study. Participants will be instructed to take their medication daily.

tenofovir

Intervention Type: DRUG

All participants will take entecavir or tenofovir throughout the study. Participants will be instructed to take their medication daily.

antihistamine

Intervention Type: DRUG

All participants will be pretreated with an oral antihistamine. The antihistamine used should in general be an H1\>H2 receptor blocker and would include diphenhydramine 50 mg, cetirizine 10 mg, chlorpheniramine 8 mg or hydroxyzine 50 mg. The Investigator is free to choose any of these antihistamines available locally and consistent with their country's Marketing Authorisation.

Interventions

ARC-520 Injection

IV injection

Intervention Type: DRUG

entecavir

All participants will take entecavir or tenofovir throughout the study. Participants will be instructed to take their medication daily.

Intervention Type: DRUG

tenofovir

All participants will take entecavir or tenofovir throughout the study. Participants will be instructed to take their medication daily.

Intervention Type: DRUG

antihistamine

All participants will be pretreated with an oral antihistamine. The antihistamine used should in general be an H1\>H2 receptor blocker and would include diphenhydramine 50 mg, cetirizine 10 mg, chlorpheniramine 8 mg or hydroxyzine 50 mg. The Investigator is free to choose any of these antihistamines available locally and consistent with their country's Marketing Authorisation.

Intervention Type: DRUG

Eligibility Criteria

Inclusion Criteria

• Patient showed a ½ log or greater reduction in serum HBsAg levels from baseline to Day 71 ± 3 days or Day 99 ± 3 days in the primary Heparc-2002 or Heparc-2003 study.
• Able to have first dose within 2 months of day 113 end-of-study visit in the primary Heparc-2002 or Heparc-2003 study.
• Able to provide written informed consent prior to the performance of any study specific procedures.
• Have no abnormalities in 12-lead ECG assessment that, in the opinion of the investigator, may compromise patient safety
• Willing and able to comply with all study assessments and adhere to the protocol schedule.
• Have no new abnormal finding of clinical relevance at the screening evaluation.
• Using 2 effective methods of contraception (double barrier contraception or hormonal contraceptive along with a barrier contraceptive) (both male and female partners) during the study and for 3 months following the last dose of (ARC 520).

Exclusion Criteria

• Pregnant or lactating.
• Acute signs of hepatitis/other infection within 4 weeks of screening and/or at the screening examination.
• Use of prescription medication (including anticoagulants) within 14 days prior to administration of ARC-520.
• Has had major surgery within 3 months of screening.
• Has evidence of severe systemic acute inflammation, sepsis, or hemolysis.
• Diagnosed with a significant psychiatric disorder that would prevent participation in the study.
• Unable or unwilling to return for all scheduled study visits.
• Has any other condition that, in the opinion of the investigator, would render the patient unsuitable for enrollment, or could interfere with his/her participation in the study.

• Minimum Eligible Age: 18 Years
• Maximum Eligible Age: 75 Years
• Eligible Sex: ALL
• Accepts Healthy Volunteers: No

Sponsors

Arrowhead Pharmaceuticals

INDUSTRY

Sponsor Role: lead

Responsible Party

Responsibility Role: SPONSOR

Locations

Research Site 1

Hong Kong, , China

Research Site 2

Leipzig, , Germany

Research Site 3

Busan, , South Korea

Research Site 5

Incheon, , South Korea

Research Site 4

Seoul, , South Korea

Research Site 6

Seoul, , South Korea

Countries

China; Germany; South Korea

Other Identifiers

2014-004201-33

Identifier Type: EUDRACT_NUMBER

Identifier Source: secondary_id

Heparc-2007

Identifier Type: -

Identifier Source: org_study_id